Anchored support for mining tools



Feb. 3, 1931. A. scHAFER ANCHORED SUPPORT FOR MINING TOOLS Fil ed July 1, 19:50

., I l I I I I I I I I L g SOhdggz/ycelvroa ILZQA 077% Patented Feb. 3, 1931 unirao erases ALADAR scHArER, or HANDIiOYA, czEcirosLovAKrA ANCHORED SUPPORT FOR MININGTOOLS Application filed July 1, 1930, Serial No. 465,232, and in Czechoslovakia July 4, 1929.

This invention relates to a tool-clamp2ng device particularly adapted for use in connection with mining and tunneling opera tions, and consists essentially in the provision of a clamping column, which serves as a guide for a drilling or other tool adapted to be fed forwardly in an aXial direction along this column and at the same time as a pivot for a second drilling or other tool or implement tiltably mounted in conjunction with his said column. The anchoring of the clamping column is efiected by means of a pivoted sprag or dog which is jammed against the side of the hole made by the drifted implement by a wedge actuated from the rearward end of the complete apparatus. If necessary a plurality of dogs of this type can be employed together with the necessary driven wedges.

An example of the embodiment of the invention is shown in the accompanying drawings, in which The clamping column is denoted by 1, and the central bore of the same, in which the 25 spindle 3 of a tool is axially displaceable, by 2. At the end of this spindle at a there is mounted a crown drill, which is disc-shaped and adapted to be employed as a cutting and drifting tool. The rotation and forward Feed of this drill is eliectedbymeans of ahandcrank 5 mounted at the outer end of the spindle 3. The disc-shaped drifting crown-drill i may also be mechanically operated. The anchoring or" the clamping column 1 in the opening worked by the crown-drill l is effected by means of the dog 6, which is pivoted on the column 1 at the point 7. This dog is provided with a fiat back 8, against which the wedge 9, which is mounted on a shaft 4- passing through a vertical guide 10 in the clamping column 1, is brought to bear. T h s wedge 9 is moved forwardly by means. of a screw-spindle 11 attached to a cylindrical bolt 12, which latter is rotatably mounted in the column 1. The bolt 12 itself is prevented from moving in an axial direction on the one hand by a, collar 13 and on the other hand by nuts 14. The rotation of the bolt 12- and of the screw-spindle 11 is efiected by means of a detachable crank 15. The rota- .ti n oi this crank causes the wedge 9, which is provided with the required internal threading to engage the screw-spindle 11-, to be moved either to or fro in the guide recess 10. If this wedge be moved in the direction towards the crown-drill 41 the dog 6 will be pivoted at the point 7 and will be jammed against the side of the opening 16 worked by the said crown-drill. The rotation of thecrank 15 in the opposite direction will relievethis jamming action, after which the clamping-column 1 is free to be readj usted as to position.- The possibilityis thus given of following up the progressive working out of the hole by the drill with progressive readjustment of the' position of the clamping-column 1. The actuation of the wedge 9 can also obviously be carried out by mechanicalor other means, for instance electrically or by hydraulic power..

There is further attached to the-clampingcolumn 1 an arm carrying a pivot 18 on which a second boring implement 19 is tiltably mounted. The rotation of this boring implement about its own axis is effected by means of the'crank handle 20, which also serves for the tilting of the said implement. In this manner slots or trenches can be hollowed out of the material for removal.

The above-described device provides a perfeet support for the implements in question so that the operator or workman is no longer required to support or to provide a purchase for these tools and can therefore devote his entire attention to the operation and tunetioningof the implements themselves. Further, if the arm 17 be adapted to be extensible or rotatable'the sphere of application of the clamping column provided by the present invention is enlarged. It will be obvious that in place of the drill 19 any other appropriate implements, for instance ramming cutting bars or combined tools, can be used in connection wtih the clamping-device according to the present invention. Whole blocks of stone can be loosened and lifted by suitable guidance of the implement 19. Parallel slots can be hollowed out in this manner and the remaining partitions then broken away by means of wedges or by any other known min ing or quarrying process.

I claim 1. A clamping device for mining, quarrying, and tunneling implements comprising in conjunction with a clamping-column a central longitudinal bore in the said column, a shaft adapted to be passed through and to be guided by the said bore, an implement adaptedto be attached to the lower end of the said shaft, means of rotation and reciprocation adapted to be applied to the upper end of the said shaft, a lateral recess in the said clamping-column, an eccentric bore in the said clamping-column disposed between the upper end of the said recess and the upper surface of the said clamping-column, a pivot-pin at the lower end of the said recess, a lever adapted to be mounted at one end on'the said pivot-pin and to rest with the other end against the inner surface of a hole formed by the said implement, a wedge adapted to be guided by the sides of the said recess having an oblique forward surface resting against the back surface of the said lever and a threaded longitudinal bore, a shaft threaded as to the lower portion of the same and adapted to bepassed through the said eccentric bore, means for preventing the movement of the said shaft in the said bore in an axial direction, and means for rotating the said shaft and adapted to be applied to the upper end of the said shaft.

2. The clamping device according to claim 1, whereby the said means for rotating the said shaft within'the said eccentric bore coinprises a crank-handle.

3. A clamping device according to claim 1, whereby the said threaded lower portion of the said shaft adapted to be passed through the said eccentric bore is adapted to engage in the said threaded longitudinal borein the said wedge, for the purpose of enabling the said Wedge to be reciprocated within the said recess and thereby to press the said lever againstthe inner surface of the said hole and to relieve this pressure as required.

4. A clamping device according to claim 1 further comprising iii-combination with the said clamping-column an arm disposed at the head end of the said column, a pivot pin at the outer end of the said arm, an implement adapted to be tiltably mounted on the said pivot pin, and'suitable means for rotating and swivelling'the said implement.

"5. Aclamping device according'to claim 1,

further comprising in combination with the said clamping-column an arm disposed at right angles to the head of the said column, a pivot pin at the outer end of the said arm, a drill adapted to be tiltably mounted on the said pivot pin, and a hand-crank adapted to be attached to the outer end of the said drill for the purpose of enabling the same to be rotated and swivelled.

In testimony whereof I have signed my name to this specification.

ALADAR soHAFER. 

